Which component of fitness is concerned with how quickly an individual can complete a task?

The component of fitness that focuses on how quickly an individual can complete a task is speed. Speed refers to the ability to move your body or parts of your body swiftly and is often measured in terms of how fast someone can run a certain distance or perform an activity. It is a vital aspect of physical performance, particularly in sports and activities that require quick movements, such as sprinting, swimming, or cycling.

Muscular endurance relates to the ability of a muscle or group of muscles to perform repeated contractions over time. Strength is about how much force a muscle can exert in a single effort. Power combines speed and strength, emphasizing the ability to exert force quickly, but it does not solely measure how quickly a task can be completed. Therefore, speed distinctly pertains to the rate of completion for tasks, making it the correct choice for this question.